The state hereby covenants with the registered owners of bonds of the authority issued pursuant to this chapter, that so long as the bonds are outstanding and unpaid the state will not materially limit or materially alter the rights and powers of the authority under this chapter to conduct the activities referred to herein in any way pertinent to the interests of the bondholders including without limitation the authority's right to collect revenues and to fulfill the terms of any covenants made with the registered owners of the bonds, or in any other way materially impair the rights and remedies of the registered owners of the bonds, unless provision for full payment of such bonds, by escrow or otherwise, has been made pursuant to the terms of the bonds or the resolution, trust indenture or security instrument securing the bonds.